* AccidentallyAccurate: In "Orpheus" Jack mans a sniper rifle during a rescue operation against a Goa'uld POWCamp. He aims for center of mass. Falls here because the showrunners' reasoning for doing that was because [[PinkMist headshots are messy]] and they didn't want to have to argue with the network censors, but trained snipers in real life aim for center of mass because it's an easier target.* ActingForTwo:** Amanda Tapping played multiple Carters in several different episodes. "Point of View" has '''''Dr.''''' Samantha Carter, "Gemini" features extended interactions between Carter and ''Repli''Carter, and "Ripple Effect" features over a dozen Carters in a single scene.*** Lampshaded when someone calls out for Carter, and ''everyone'' stares at him.** "Tin Man", where the alien Harlan creates robotic duplicates of SG-1. They reappear in "Double Jeopardy", where the two O'Neills get into a fistfight.** Guest star Creator/DomDeLuise (briefly) as the title character and his creator in "Urgo".** Starting in season nine, Ba'al began cloning himself, with Cliff Simon playing multiple Ba'als in several episodes.* ActorAllusion:** The show was fond of making ''Series/MacGyver'' references -- which of course, leads to CelebrityParadox. Lampshaded by Amanda Tapping in a blooper shown in the 200th episode special [[http://www.youtube.com/watch?v=7PdY3L-JYzk "Inside the 200th Episode"]]. O'Neill is from Minnesota, the same state [=MacGyver=] is from (also Richard Dean Anderson's home state). Like [=MacGyver=], O'Neill is an astronomy enthusiast ([=MacGyver=] was shown living in an observatory in the pilot of his TV show). An inversion: Jack likes having a gun and will protest whenever he's told to not carry one, while [=MacGyver=] did not like guns and was known for avoiding their use. Like [=MacGyver=], O'Neill is an avid fisherman. Both [=MacGyver=] and O'Neill are shown to be hockey fans.** John Billinsley guest-starred in the season six episode "The Other Guys" as Dr. Coombs, who was a profound {{Trekkie}}. John Billinsley was at the same time starring as Dr. Phlox on ''Series/StarTrekEnterprise''.*** The name of his character is also probably a shout-out, as Jeffery Combs was a prolific actor in multiple Star Trek shows, including Deep Space Nine (Weyoun, Brunt, others) and Enterprise (most noted for Shran, but also others).** Patrick [=McKenna=] guest-starred in "The Other Guys" and "Avenger 2.0" as Dr. Jay Felger. In the latter episode he was seen putting a roll of duct tape into his backpack. DVD commentary confirmed this was a ShoutOut to ''Series/TheRedGreenShow'', where [=McKenna=] played Harold.** When Vala is pitching story ideas to Martin Lloyd in "200", he immediately recognizes her pitches as retreads of classic stories, including ''Film/TheWizardOfOz'' and ''Series/GilligansIsland''. He recommends that, if she is going to rip off something, make sure it is something nobody has ever heard of. Her next suggestion is ''Series/{{Farscape}}'', the series she (Claudia Black) and Mitchell (Ben Browder) had previously starred in before joining ''SG-1'', with Claudia reprising her role as Aeryn Sun (Browder did not appear as John Crichton, but instead as Stark, while Michael Shanks was Crichton, in a meta-reference to the resemblance between the two actors). [[SelfDeprecation Martin admits that he had never heard of that one.]]** When the one-off character Alec Colson, played by Charles Shaughnessy, enters the Alpha Site the first person he's introduced to is one Captain [[Series/TheNanny Sheffield]].** Creator/DwightSchultz plays The Gamekeeper who runs a virtual reality simulation and insists that the inhabitants never leave it. On ''Series/StarTrekTheNextGeneration'', Schultz played Lt. Reginald Barclay who spent all his free time on the holodeck and was afraid to leave it.* AscendedFanon: Originally Jack and Sam were never supposed to develop romantic feelings for each other. When the Jack×Sam shipping started in the fandom, the writers noticed that they had the chemistry for it and threw it in.* BackedByThePentagon: Particularly the US Air Force. Multiple real-life Air Force Chiefs of Staff have appeared on the show, playing themselves. Other branches became involved on occasion, and the US Navy loaned them a submarine for "Small Victories." And again for the movie "Continuum".** The Air Force even made Richard Dean Anderson an honorary [[https://vimeo.com/10739270 Brigadier General]], as well as gave the show an award for their portrayal of service men and women.* ChannelHop: From {{Showtime}} to the [[Creator/{{Syfy}} Sci Fi Channel]] in 2002, after season 5 wrapped.* TheCharacterDiedWithHim: Don Davis died of a heart attack a few years after retiring from the show, and Carter mentions in the ''Series/StargateAtlantis'' series finale that Hammond died the same way. In ''Series/StargateUniverse'', the USS ''George Hammond'' is named in his honor.* CowboyBebopAtHisComputer** The episode summaries that come with the box-set DVD releases for the series are often wildly incorrect with regards to basic information about the show. This includes the occasional misnaming of technology and aliens, [[CriticalResearchFailure but also refers to the show as taking place on a ship, with SG-1 as "the crew".]]** The text on the back of the DVD cover of the Swedish release of "Children of the Gods" (DVD release of the pilot episode) claims that the villains of the movie are Ra, "the brutal Goa'uld", and ''General Hammond''. This is very not correct. [[hottip:note: General Hammond is the ''leader of Stargate Command,'' AKA the good guys, and Ra was killed with a nuclear weapon at the conclusion of the pilot film.]]* {{Defictionalization}}: There is a door in the real-life Cheyenne Mountain Complex labelled "Stargate Command", which some sources say has six locks and a guard placed next to it. Whether or not the locks and guard are really there, the door itself leads to a broom closet.* DirectedByCastMember:** Richard Dean Anderson was tapped as executive producer for the series from day one, which he joked was a great way to make sure he showed up on time every day.** Amanda Tapping, Michael Shanks, and Christopher Judge all wrote or directed episodes, and Ben Browder shared a story credit for one episode.* DoingItForTheArt: One of the "flashbacks" from "200" features an incident where O'Neill was rendered invisible; one of the scenes features him walking down a hallway and talking with Teal'c, but since he is invisible he can only be located by the coffeee cup that he is carrying at the time. The plan was to have one of Richard Dean Anderson's stand-ins or stunt-doubles actually perform the scene, since it would require wearing a full-body green suit in order to have the body edited out in post production, but RDA insisted on actually performing the scene himself. You still cannot see him, since he is invisible, but hopefully you can just ''tell'' that it is '''really''' O'Neill walking with Teal'c.* FakeAmerican: Filmed in Canada, so a large segment of the cast. Amanda Tapping in particular was born in England and raised in Canada.%%* FakeNationality: * FakeRussian: With BilingualBonus and shades of NoFourthWall at times if you can handle the bad grammar. English actors Gary Chalk and Marina Sirtis play Russians ({{recurrer}} Colonel Chekov and one-shot Dr. Svetlana Markova, respectively).* FanNickname:** Before he finally got named "[=CSgt=] Walter Harriman", the guy with the longest total tenure shouting out [[EngagingChevrons which chevron they're currently on]] was called "Chevron Guy".** Replicator Carter is frequently compressed to [=RepliCarter=].* ImageSource: This series provides the page image for:** AscendToAHigherPlaneOfExistence ("Meridian") ** CoolGate** CrystalSkull ("Crystal Skull") ** {{Elseworld}} ("200")** TheFaceless ("Revelation") * OldShame: ** Not the series itself, but the disintegration feature of Zats. The writers have frequently mentioned in episode commentaries what a bad idea that was, to the point where they mock it in-universe in "Wormhole X-treme!"** Carter's EstablishingCharacterMoment monologue has been ''repeatedly'' mocked in subsequent episode, as no one on the staff liked it.* TheOtherDarrin:** ''SG-1'' recast every character from the original ''Film/{{Stargate}}'' with the exception of Daniel's brother-in-law Skaara (Alexis Cruz) and father-in-law Kasuf (Erick Avari). [[LampshadeHanging Lampshaded]] when O'Neill is mistaken for another soldier with the same name (except that it's spelled O'Nei'''l''') and he remarks that the other one had no sense of humor.** Elizabeth Weir was played by Jessica Steen in "Lost City", then was replaced by Torri Higginson for "The New Order", ''Series/StargateAtlantis'' and Season 10's {{crossover}} "The Pegasus Project". Michelle Morgan played her during later events in ''Atlantis'', though this instance was given a HandWave.** Drey'auc was played by Salli Richardson in "Bloodlines" before being replaced by Brook Parker in "Family" and "Threshold".** An odd semi-example: When Apophis is [[TheFaceless masked]] while under the alias Na'onak, he is played by Dion Johnstone instead of Peter Williams.* RealitySubtext:** Vaitiare Bandera (Sha're) was married to Michael Shanks (Daniel Jackson) in real life, and was pregnant with his child when her character was written as carrying Apophis' son.** Michael Shanks got appendicitis during the filming of "Nemesis", so Daniel Jackson was written out of most of the action in that episode and "Small Victories" by also giving him appendicitis.** Carter temporarily changed her primary weapon from the P90 to the custom-built "Carter Special" starting in the middle of season 7 because the show's suppliers ran short of P90 blanks during the [[TheWarOnTerror invasion of Iraq.]]** At a convention panel, actor Don S. Davis (General Hammond) was asked what role he would play if given a choice of switching characters, and he responded that he would play his own role since he had the best chair on the set. When Hammond returned in "Prometheus Unbound" after he was promoted away from the SGC, he made a point of taking the chair with him when boarded the ''Prometheus''.** Vala's pregnancy in season nine stemmed from Claudia Black's real-life pregnancy.** Sergeant Siler is routinely battered throughout the series, from being a test target for new staff-weapon armor, to having a DHD blow up in his face. At first glance it's just a running gag, like Daniel dying and coming back to life all the time, but then you see the credits and find out that Dan Shea, the actor that portrays the good Sergeant, is also the stunt coordinator. Also, Shea was Richard Dean Anderson's stunt double in both ''Series/MacGyver'' and ''SG-1''.* RealLifeRelative: Lexa Doig, who played Dr. Carolyn Lam in season 9 and 10 is the wife of Michael Shanks, who plays Daniel.** The actress who played Sha're was an earlier wife of his.* RecycledScript: Season 1's "Emancipation" was basically a clone of ''Series/StarTrekTheNextGeneration'': [[Recap/StarTrekTheNextGenerationS1E3CodeOfHonor "Code of Honor"]] by the same writer, and was about as well thought of.* TalkingToHimself: Michael Shanks voices several Asgard, including Thor, so whenever one of them and Daniel Jackson are talking to one another, it's an example of this. Lampshaded when speaking to [[InsufferableGenius Kvasir]], Daniel dryly comments he misses Thor.* ThrowItIn:** Most of Jack O'Neill's snarking for the first couple of seasons was improvised by Richard Dean Anderson, after which the writers gave up and started writing it into the scripts.** Samantha Carter's line in "Children of the Gods" about how the SGC's gate control computer had been {{MacGyver|ing}}ed from three supercomputers was an ad-lib Creator/AmandaTapping came up with during her audition.** The concept of Jaffa performing a meditation called "kel'no'reem" was apparently inspired by Christopher Judge falling asleep on set during a take, and Michael Shanks quipping "Oh, he's not sleeping, he's ''meditating''."** The RomanceArc between Jack and Sam started with an exchange in "Solitudes" that was ad-libbed by RDA and Tapping. Trapped in an [[spoiler:Antarctic]] ice cave, they snuggle together for warmth.---> '''Sam:''' ... Sir?\\'''Jack:''' [[OrAreYouJustHappyToSeeMe It's my sidearm. I swear it's my sidearm.]]** Most of the dialogue of the titular character in ''Urgo'' was ad-libbed by Dom [=DeLuise=]. Part of the reason why he has so few scenes where he's in frame with Christopher Judge is that the later had trouble keeping Teal'c trademark stoic attitude around the former.* TropeCodifier: For IDieFree.* TropeNamer: This series named the following tropes:** AscendToAHigherPlaneOfExistence** EngagingChevrons [[invoked]]** OpenTheIris ([[ThisIndexIsNotAnExample although it's not an example]])** RememberWhenYouBlewUpASun* UnCanceled: From season six through season eight, the showrunners were in constant fear of cancellation and, unlike previously where the season finale ended on a cliffhanger, closed out the season's arc solidly. And yet [[Creator/{{Syfy}} Sci Fi Channel]] kept renewing it, continually derailing plans for a GrandFinale film (a fact [[MythologyGag referenced]] by "200"). And then just as the showrunners decided they could keep going, [[ScrewedByTheNetwork the network ended the series]].* WhatCouldHaveBeen:** Apparently, there were plans to make Adria more long-lasting, including having her fuse with a Goa'uld symbiote. However, plans fell through after Sci-Fi ended the series, and instead had her do a re-hash of Anubis's final plot. The Goa'uld symbiote part actually happened in abbreviated form, resulting in Adria having to AscendToAHigherPlaneOfExistence after a failed extraction attempt killed the symbiote but left her dying.** After the series ended the plan was to do one or two movies a year for both SG-1 and ''Series/StargateAtlantis'', but according to the producers the bottom fell out of the DVD market and Sci Fi balked at continuing after the first two. Apparently the third movie, entitled ''Stargate: Revolution'', would have featured Jack's return as the main character ''and'' it would have finally had the Stargate program going public. However it can be considered shelved for good at this point.* WithLyrics: The theme song was given lyrics in the DVD commentary for "Prodigy", sung by the producers.* WordOfGod: The cast has at times spoken about what ''they'' think was going on between the scenes and time-skips in the series finale, "Unending". In particular, Amanda Tapping and Christopher Judge said they played their interactions to imply Carter and Teal'c had developed a relationship, and either Claudia Black or Michael Shanks said the reason Vala's crying in one scene is because she miscarried.* WordOfSaintPaul: The finale of the series contains a long TimePassesMontage with little to no dialogue throughout. Several of the actors involved have given their take on what happened -- such as Creator/AmandaTapping and Chris Judge saying they played their parts as if Sam and Teal'c had developed a relationship, and Michael Shanks saying the reason that Vala is crying and being consoled by Daniel in one scene is because she miscarried.----